The coins have been sitting in this wallet unued since 2013....no activity.....I just recently decided to move them to a different computer so I need to download the latest blockchain so I could prosess a transfer. During the downloiad I got hacked.....the download never completed and I did not try to make a transfer

This is likely the most important part. HOW did you "move them to a different computer"? Did you copy only the one private key or the entire wallet.dat?

Also, do you still have access to the old computer? If so, (and if what you are saying is accurate), then in all likelihood all the private keys needed to access all your BTC are in there. You can export ALL the private keys from there and import them elsewhere.

Likewise for Litecoin (Lite not Light), you should copy your wallet.dat over.

The good news is that it seems extremely unlikely you got hacked since the coins have not moved in 18 months. ;-)

I am returning to this thread because I still have a problem. Its now worse. Please see thread for details. The screen shot below shows the error message that I am now getting. After my last conversation I went to update the blockchain and after I left it for a while Bitcoin stopped working.....all the while I was getting error message that computers were trying to access Bicoin (Hack attempts)

I am returning to this thread because I still have a problem. Its now worse. Please see thread for details. The screen shot below shows the error message that I am now getting. After my last conversation I went to update the blockchain and after I left it for a while Bitcoin stopped working.....all the while I was getting error message that computers were trying to access Bicoin (Hack attempts)

Can you post a screenshot about these messages about hack attempts? These are probably not hack attempts but rather Bitcoin Core attempting to connect to the Bitcoin network. These messages are probably from your firewall, and you must let Bitcoin Core through the firewall in order to connect properly to the network.

That is not a hacking attempt, that is a node on the Bitcoin network trying to make a connection to your node. You should click "allow" so that you have a connection to the Bitcoin network and can fully sync the blockchain.

Great.....!but I still cant boot the program....I get the error message (See screen shot in last message)....how do I get the software to open....

Can you post a screenshot of the report when you click report?I think the solution would be to just reinstall Bitcoin Core. Reinstalling will not delete the blockchain you already downloaded previously, nor will it delete your wallet. Just to be safe though, before reinstalling, copy the wallet.dat file to a safe location.

I would suggest:1) If you know enough about your OS to do a low level file search, search for wallet.dat2) If you know enough about bitcoin-qt to determine which of the wallet.dat files is correct, copy that one to backup.3) If you know enough about partial nodes like Multibit or bitcoinJ, try importing your backed-up wallet.dat into one of those.

partial node programs will sync with the blockchain many many orders of magnitude faster. Minutes -vs- days.

Thanks to everyone for all your help so far....In my saga I am now trying to reload Bitcoin core....however....I cant.....I downloaded the latest version from Bitcoin.org....but when I try to load it....I am getting the same error message....see screen shot below

I even tried deleting the old version by dragging it into the trach and then reloading but I got the same error message ....if I do a search using the hour glass in the top right for wallet.dat.....I find nothing......I did back up wallet.dat to a flash when I first did this so I have it

If you know how to start a shell, you could try to see if bitcoind or bitcoin-cli will work. If you can run those, then you can still export your keys through there. This will likely be more entailed and less point and click than bitcoin-qt

I HAVE THE COIN DATA BACKED UP AS A .DAT FILE....CAN I TRY LOADING A DIFFERENT PROGRAM AND OPENING THE COINS IN THAT OTHER PROGRAM EVEN IF THEY WERE CREATED/BACKED UP FROM THRE BITCOIN CORE PROGRAM?

Yes. You can import the wallet.dat file into blockchain.info's web wallet and perhaps other wallets too. However, if you do that, I would recommend that once the wallet is imported, to move all of the Bitcoin to a new wallet and not receive any Bitcoin on addresses from the old wallet.

The "quit unexpectedly" error is for sure not caused by the combination of software. I've been running this version of OSX and various version of Bitcoin on many Macintoshes without a problem. The only problem that I had with this combination was related to the bad disk drives that kept passing various Apple diagnostics until I grew suspicious and booted Debian Linux and run its diagnostics (badblocks).

I just tried to do a work arouind and load Multibit HD instead of Bitcoin COre....I got the same error message "....can't use this version of Multi bit with this version of Mac......I ran the Mac updates but its not updating to the newest version.....I dont understand the last post....so what do I do?

I just tried to do a work arouind and load Multibit HD instead of Bitcoin COre....I got the same error message "....can't use this version of Multi bit with this version of Mac......I ran the Mac updates but its not updating to the newest version.....I dont understand the last post....so what do I do?

You either need to use older versions of the software or change your OS. You could upgrade to the latest version of OS X and all of the current software should support it. Or you can install a different OS such as a distribution of Linux or a copy of Windows.

The last post was discussing hardware issues. Since Bitcoin core is very hardware intensive, it is a good test of whether your hardware is failing or not. Apple has diagnostics to check your hardware, but you should also use other tools to check also. 2112 used diagnostics from Debian due to his suspicions of hardware failure.

Hi Stlll having trouble...I updated my OS X to Yosemite and loaded Multibit HD....I was hoping to restore the .dat files I have on a flash drive that were created in Bitcoin Core....However....Multibit is requireriung "Wallet Words" to start the restore process so I can import my coins from my flash.....Problem is I don't have any wallet words.....I only have a password for those coins. How do I do a restore if I don't have the wallet words it is requesting. I never made any wallet words